Take 6 pre rusted brass and copper coupons and set them aside in trays.
Take citric acid crystals in a beaker to make the 2%citric acid solution. Stir until the crystals completely dissolve.
In this experiment,550 ml of the solution was prepared so 11g of citric acid crystals was used.
Once the 2% citric acid is ready, immerse the brass/copper coupons in it and leave it for 10 min.
After the 10 min, take out the coupons and give it a gentle wipe down with kimwipes to dry out the coupons of the citric acid .
The initial visual reading would be a 5 so accordingly on how much you think the rust has been removed, give a reading from 1-5(1- being rust has been totally removed, 5-being no change)
The result of this experiment was no change.
We started with an initial rating of 5 and the final rating would be a 5 as well.